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P0130 A/F SENSOR 1 ECM-197 < DTC/CIRCUIT DIAGNOSIS > [MR20DD] C D E F G H I J K L M A ECM N P O P0130 A/F SENSOR 1 DTC Description INFOID:0000000010702921 DTC DETECTION LOGIC To judge malfunctions, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 sig- POSSIBLE CAUSE • Harness or connectors (The A/F sensor 1 circuit is open or shorted.) FAIL-SAFE Not applicable PERFORM DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at Will CONSULT be used? YES >> GO TO 2. NO >> GO TO 6. 2. CHECK AIR FUEL RATIO (A/F) SENSOR 1 FUNCTION WITH CONSULT 1. Start engine and warm it up to normal operating temperature. 2. Select “A/F SEN1 (B1)” in “DATA MONITOR” mode of “ENGINE” with CONSULT. 3. Check “A/F SEN1 (B1)” indication. Does the indication constantly fluctuate around 2.2 V? YES >> GO TO 3. NO >> Proceed to ECM-198, "Diagnosis Procedure" . 3. PERFORM DTC CONFIRMATION PROCEDURE-1 1. Select “ENGINE” of “A/F SEN1” in “DTC WORK SUPPORT” mode of “A/F (B1) P0130” with CONSULT. 2. “TESTING” is displayed on the CONSULT screen when the following conditions are met. CAUTION: Always drive vehicle at a safe speed. Is “TESTING” displayed on CONSULT screen? YES >> GO TO 4. NO >> If “TESTING” is not displayed after 20 seconds, GO TO 2. 4. PERFORM DTC CONFIRMATION PROCEDURE-2 1. Release accelerator pedal fully. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition P0130 A/F SENSOR1 (B1) The output voltage computed by ECM according to the A/F sensor 1 signal ENG SPEED 850 - 2,300 rpm VHCL SPEED SE More than 64 km/h (40 mph) B/FUEL SCHDL 1.0 - 8.0 msec Selector lever Suitable position |